SAP Message AD320 - &: Key length > max. key length (&). Please check

Diagnosis
The key length of a logical pooled table is greater than the maximumkey length of a physical pool.
The definition of a table pool contains at least two key fields and onelong argument field. The first key field contains the name of the pooledtable, the second key field (VARKEY) the primary key field of thistable and the long argument field the non-key fields of the pooledtable. The field VARKEY is of type CHAR(n), where the maximum keylength which is permitted is n <= 110.
The key fields of the logical pooled table which you are editing needsmore space than there is in field VARKEY. Therefore it is not possibleto assign it to a physical pool.

Procedure
Remove fields from the key.